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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Fast and accurate solvers for the three dimensional elastic scattering problems
三维弹性 散射 求解器 弹性波
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2023/4/26
The scattering problems for elastic waves have recently received ever increasing attentions in both the engineering and mathematical communities for their important applications in geophysics and seis...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Introduction to Peridynamics model and a POD-based fast algorithm for the nonlocal unsteady problems
近场动力学模型 POD 非局部 非定常问题 快速算法
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2023/5/6
A brief introduction to Peridynamics model and a fast algorithm for the nonlocal unsteady problems is given in this talk. The POD algorithm can be employed in the numerical simulation of nonlocal diff...
FAST索网疲劳评估及高疲劳性能钢索研制
疲劳性能 有限元分析 射电望远镜
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2015/11/6
500 m口径射电望远镜(FAST)采用柔性索网作为主要支承结构,变位观测过程中索网将长期承受高达500MPa的疲劳载荷,约为目前相关标准规范规定值的两倍。索网结构将是该望远镜系统的关键易损部件,故该文主要开展如下工作：1) 根据望远镜的科学目标,估算未来30年望远镜的观测轨迹,评估望远镜运行观测对索网结构疲劳性能的要求;2) 结合环氧涂层技术和改进挤压锚固工艺研制高疲劳性能钢索结构,并通过实验验...
A Fast Multigrid Method For Solving Incompressible Hydrodynamic Problems With nee Surfaces
Fast Multigrid Method Solving Incompressible Hydrodynamic Problems nee Surfaces
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2015/7/1
Partial support for this work Was Provided through ONR Grant N00014-89-J-1366 and DAWA Grant N00014-89-J-0759, This support is gratefully acknowledged by the authors.
FAST望远镜的馈源支撑是一个跨度巨大的柔索牵引并联机构，其中可承载用于收集射电波信号的馈源接收机的馈源舱由六根并联的支撑钢索悬挂于空中，并随着6索的协调收/放可在空中大范围缓慢运动。由于支撑钢索的截面尺寸较大，在机构平衡状态下其自重不能忽略。其中一部分钢索还需要悬挂入舱的动力电缆和通讯光缆，因此馈源舱运动范围、馈源舱姿态、各索的张力和索的几何构形均存在着复杂的耦合关系。该文建立了支撑钢索和馈源舱...